the-way-to-go_ZH_CN/eBook/examples/chapter_15/smtp_auth.go

// smtp_auth.go
package main

import (
        "log"
        "net/smtp"
)

func main() {
        // Set up authentication information.
        auth := smtp.PlainAuth(
                "",
                "[email protected]",
                "password",
                "mail.example.com",
        )
        // Connect to the server, authenticate, set the sender and recipient,
        // and send the email all in one step.
        err := smtp.SendMail(
                "mail.example.com:25",
                auth,
                "[email protected]",
                []string{"[email protected]"},
                []byte("This is the email body."),
        )
        if err != nil {
                log.Fatal(err)
        }
}